张建伟, 樊亚龙, 岳建伟,等.海水侵蚀环境下CFRP复合桩水平承载特性研究[J].河南理工大学学报（自然科学版）,2022,41(4):142-148.

ZHANG J W, FAN Y L, YUE J W, et al.Research on horizontal bearing characteristics of CFRP composite piles in seawater erosion environment[J].Journal of Henan Polytechnic University(Natural Science) ,2022,41(4):142-148.

海水侵蚀环境下CFRP复合桩水平承载特性研究

张建伟1,2, 樊亚龙1, 岳建伟1,2, 李荣翔1, 王浩1,2

1.河南大学 土木建筑学院，河南 开封475004，;2.河南省轨道交通智能建造工程技术中心，河南 开封 475004

摘要:为了研究碳纤维增强复合材料（carbon fiber reinforced polymer， CFRP）复合桩在海洋环境中的水平承载特性，利用人工配置的高浓度海水作为浸泡溶液，开展不同浸泡时间下CFRP材料拉伸试验、桩身抗弯刚度试验和水平承载桩足尺模型试验。结果表明：相同试验条件下，浸泡180 d后，CFRP筋、CFRP布、钢筋的强度分别下降5.34% ，6.64%、12.93% ；复合桩和钢筋混凝土桩的桩身抗弯刚度分别降低7.89%和26.50% ；在桩顶施加4 kN水平荷载作用，复合桩和钢筋混凝土桩的最大位移分别为14.22，18.65 mm，比未浸泡阶段的水平位移分别增加 17.42%和40.12% ；复合桩和钢筋混凝土桩的桩身最大弯矩分别为417.5，514.1 N·m，比未浸泡阶段分别增加7.30%和21.29%。试验结果可为海洋环境下CFRP复合桩的水平承载力设计提供理论参考。

关键词:CFRP复合桩;人工海水;浸泡实验;水平承载特性;耐久性能

doi:10.16186/j.cnki.1673-9787.2020080005

基金项目:国家自然科学基金资助项目（51508163）；河南省科技攻关重点项目（192102310226）；河南省高等学校青年骨干教师培养 计划（2019GGJS041）

收稿日期:2020-08-01 00:00:00

修回日期:2020-09-08 00:00:00

出版日期:2022/07/15

Research on horizontal bearing characteristics of CFRP composite piles in seawater erosion environment

ZHANG Jianwei1,2, FAN Yalong1, YUE Jianwei1,2, LI Rongxiang1, WANG Hao1,2

1.School of Civil Engineering and Architecture， Henan University， Kaifeng 475004 ， Henan， China;2.Henan Provincial Research Center of Engineering on Intelligent Construction of Rail Transit， Kaifeng  475004 ， Henan， China

Abstract: In order to study the horizontal bearing characteristics of CFRPcomposite piles in the marine envi- ronment , artificially configured high-concentration seawater was used as the immersion solution to carry out tensile tests of CFRP materials under different immersion times,flexural rigidity tests of the pile body, and full-scale model tests of horizontal load-bearing piles. The results showed that under the same test conditions, after 180 days of soaking, the strength of CFRP tendons，CFRP sheets, and steel bars decreased by 5.34%，6. 64% ， and 12. 93% , respectively; The bending stiffness of composite piles and reinforced concrete piles decreased by 7.89% and 26.50% ; 4 kN horizontal load was applied to the top of the pile ,the maximum dis- placements of composite piles and reinforced concrete piles were 14.22 mm and 18. 65 mm，respectively, which were 17.42% and 40.12% higher than the horizontal displacements in the unsoaked stage;The maximum bending moments of the composite piles and reinforced concrete piles were 417.5 N·m and 514.1N·m , respectively, which were 7.30% and 21.29% higher than the unsoaked stage. The experimental results could provide references for the horizontal bearing capacity design of CFRP composite piles in marine environments.

Key words:CFRP composite pile;artificial seawater;soaking experiment;horizontal bearing characteristic;durability

海水侵蚀环境下CFRP复合桩水平承载特性研究_张建伟.pdf